diff --git a/nixos/modules/system/boot/systemd.nix b/nixos/modules/system/boot/systemd.nix
index 36d273564083..f70efeca4b9f 100644
--- a/nixos/modules/system/boot/systemd.nix
+++ b/nixos/modules/system/boot/systemd.nix
@@ -140,6 +140,11 @@ let
       "user.slice"
       "machine.slice"
       "systemd-machined.service"
+
+      # Temporary file creation / cleanup.
+      "systemd-tmpfiles-clean.service"
+      "systemd-tmpfiles-setup.service"
+      "systemd-tmpfiles-setup-dev.service"
     ]
 
     ++ optionals cfg.enableEmergencyMode [
@@ -739,5 +744,7 @@ in
     # just like the system units.
     environment.etc."systemd/user".source = "${systemd}/example/systemd/user";
 
+    environment.etc."tmpfiles.d/x11.conf".source = "${systemd}/example/tmpfiles.d/x11.conf";
+
   };
 }